Mechanical seals

1. At the end of this workshop participants will be able to:
• Demonstrate a sound understanding of the fundamentals of seal
selection
• Understand environmental considerations related to seals
• See how the experts repair and rebuild seals for outstanding
performance
• Troubleshoot seals
• Maximise mechanical seal life
• Classify various seals, including special seal types
• Explain considerations related to the materials used in seal
construction
Practical
MECHANICAL SEALS -
SELECTION, MAINTENANCE
and TROUBLESHOOTING
YOU WILL LEARN HOW TO:
7.37

2. DAY TWO
ENVIRONMENTAL CONSIDERATIONS
AND CONTROL
• Abrasives, heat, dry operation
• Flushing, recirculation, quenching
• Convection, cooling, jacketing
• Buffer and barrier fluid
• Dead end lubrication, grease packing,
circulating face lubrication
• API 610 environmental control schemes
AUXILIARY EQUIPMENT
• Cyclone separators
• Pressurization units
• Air-coolers and heat exchangers
• Rotameters and flow controllers
• Leakage detectors
• Filters and strainers
SEAL HANDLING AND INSTALLATION
• General considerations
• Seat squareness
SEAL FAILURES
• Factors influencing seal life
• Factors affecting seal performance
• Seal malfunction and probable causes
• Friction and wear
• Adhesion, abrasion
• Corrosion and surface fatigue
SEAL SELECTION AND STANDARDS
• Seal selection guides
• Standards-ISO, British, DIN, ASME
TROUBLESHOOTING FAILED SEALS
• At the pumping site
• At the equipment teardown
• Discoloration, chipping, cracking, rubbing,
elastomer swelling, stickiness, hardness -
what do these mean?
HOW TO MAXIMISE MECHANICAL
SEAL LIFE
• Preparing the pump - mechanically,
hydraulically
• Controlling temperature in the stuffing box
• Controlling pressure in the stuffing box
• What seal to choose?
• What face combination and elastomer?
SUMMARY, OPEN FORUM & CLOSING
DAY ONE
FUNDAMENTALS AND PRINCIPLES
• Definition of zero leakage
• Mechanics of sealing
• Purpose of sealing
• Basics regarding speed and pressure
• Basic seal requirements
• Seal friction
• Wear and seal life
• Texture
• Seal balance criterion - balance ratio,
pressure distribution
• Seal applications
• Operating capabilities, advantages and
limitations
SEAL DESIGN AND CLASSIFICATION
• Identifying seal components and their
function
• Primary sealing components - seal head,
seal seat, springs for face loading, metal
bellows
• Secondary sealing components -
elastomeric O-rings, V-rings, U-cup rings,
wedge rings
• Inside and outside seals
• General arrangement modes
- Single: cartridge, component, split,
stationary
- Duplex: tandem, back-to-back
• Static and dynamic seals
• Rotating and stationary seal heads
• Sealing face conditions
• Seal pre-loading
SPECIAL SEAL TYPES
• Bellows
• Bushing, labyrinth, diaphragm
• Gas, motion, slurry
• Carbon seals
• Liquid ring and liquid barrier seals
• Inflatable, ferrofluidic
• Positive action type
• Self-adhesive compression seals
MATERIALS OF SEAL CONSTRUCTION
• General considerations
• Properties of elastomers
• Elastomeric materials
• Plastic polymers
• Cemented carbides
• Miscellaneous sealing materials
• Material compatibility
SEALS FOR SPECIFIC/SPECIAL
APPLICATIONS
• Hydraulic
• Pneumatic
• High temperature
• Large diameter
THE PROGRAM
Whether you consider yourself as amateur or
knowledgeable, practical or theoretical, you will
find this two-day Mechanical Seal workshop is
jam-packed with useful, easy to apply
information.
Faced with the bewildering task of selecting the
correct seal type and materials of construction for
a given application, it's no wonder many end
users leave the job to others. After attending this
course, you will gain the knowledge and
confidence, to select correct seal types, analyse
failed seals, determine the cause/s of failure and
propose practical, remedial action. Learn how,
with simple modifications, you can extend seal
life and reduce or eliminate causes of premature
seal failure.
The course commences with a solid review of the
fundamentals, basic principles and looks at seal
classification and design. Special seal types are
examined and the materials used to construct
seals ranging from elastomeric materials to
cemented carbides are examined. Day One is
concluded with an examination of seals for
specific applications. The Second day focuses on
environmental considerations of seals, seal
handling and installation, seal failure and
troubleshooting seals. The course is rounded off
with an examination of the all-important topic of
how to maximise seal life and thus derive
measurable financial savings from your
knowledge of seals.
Through this course, you will understand the
basic needs of mechanical seals, and by applying
what you learn, you will positively impact on the
real costs of seal ownership to your company.
THE WORKSHOP
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ON-SITE TRAINING